/*
* Copyright (c) Microsoft Corporation. All rights reserved.
* Copyright (c) 2023 Huawei Device Co., Ltd.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* This file has been modified by Huawei to verify type inference by adding verification statements.
*/

// === tests/cases/compiler/typeParameterDiamond1.ts ===
declare function AssertType(value:any, type:string):void;
function diamondTop<Top>() {
    function diamondMiddle<T extends Top, U extends Top>() {
AssertType(diamondMiddle, "<T extends Top, U extends Top>() => void");

        function diamondBottom<Bottom extends T | U>() {
AssertType(diamondBottom, "<Bottom extends union>() => void");

            let top: Top;
AssertType(top, "Top");

            let middle: T | U;
AssertType(middle, "union");

            let bottom: Bottom;
AssertType(bottom, "Bottom");

            top = middle;
AssertType(top = middle, "union");
AssertType(top, "Top");
AssertType(middle, "union");

            middle = bottom;
AssertType(middle = bottom, "Bottom");
AssertType(middle, "union");
AssertType(bottom, "Bottom");

            top = bottom;
AssertType(top = bottom, "Bottom");
AssertType(top, "Top");
AssertType(bottom, "Bottom");
        }
    }
}

